Google Knowledge Graph: Entity isReference Domains
Proprietary analysis of Google's entity validation patterns across the Knowledge Graph.
⚠️ You Can't Use Just ANY Domain!
Out of 1,738,093 domains we monitor, only 62,202 qualify as isReference domains.
3.65%
Only 3.65% of domains earn isReference status from Google. Domain selection is critical.
Wikipedia is NOT Required (or even your best bet)
Wikipedia: 6 million entities
Kalicube Pro: 71 million entities
Knowledge Graph: 50 billion entities
0.012%
Wikipedia covers only 0.012% of the Knowledge Graph. If your entity isn't in that 0.012%, you need to build a Knowledge Panel with ~30 isReference url instead.
📊 Kalicube's Entity Validation Dataset
💡 Even Small Niche Domains Have isReference Authority
Examples from our dataset (December 2025):
| kalicube.com | 21 entities |
| searchengineland.com | 11 entities |
| jasonbarnard.com | 86 entities |
| searchenginejournal.com | 270 entities |
| entrepreneur.com | 1,292 entities |
| forbes.com | 2,823 entities |
Your niche-specific domains may have similar authority in your category.
Top 100 isReference Domains for All Entity Types
| Rank | Domain | Entity Count |
|---|---|---|
| 1 | wikipedia.org | 1,622,000 |
| 2 | linkedin.com | 208,626 |
| 3 | twitter.com | 192,595 |
| 4 | instagram.com | 130,806 |
| 5 | x.com | 103,139 |
| 6 | allocine.fr | 102,373 |
| 7 | amazon.com | 90,536 |
| 8 | facebook.com | 71,745 |
| 9 | deezer.com | 56,433 |
| 10 | namu.wiki | 40,220 |
| 11 | google.com | 34,628 |
| 12 | youtube.com | 34,134 |
| 13 | legacy.com | 28,343 |
| 14 | britannica.com | 19,466 |
| 15 | wiktionary.org | 17,928 |
| 16 | reddit.com | 17,774 |
| 17 | trustpilot.com | 14,565 |
| 18 | yahoo.com | 13,868 |
| 19 | dictionary.com | 12,814 |
| 20 | isfdb.org | 11,537 |
| 21 | fandom.com | 11,308 |
| 22 | crunchbase.com | 10,431 |
| 23 | microsoft.com | 10,069 |
| 24 | gutenberg.org | 9,728 |
| 25 | tiktok.com | 9,387 |
| 26 | metacritic.com | 9,121 |
| 27 | rottentomatoes.com | 8,179 |
| 28 | uk.com | 7,323 |
| 29 | espn.com | 7,041 |
| 30 | letterboxd.com | 6,982 |
| 31 | github.com | 6,431 |
| 32 | apple.com | 5,790 |
| 33 | quora.com | 5,641 |
| 34 | fifa.com | 5,609 |
| 35 | history.com | 5,498 |
| 36 | shopee.co.id | 5,301 |
| 37 | spotify.com | 5,252 |
| 38 | wikia.com | 5,249 |
| 39 | bbc.co.uk | 4,968 |
| 40 | pinterest.com | 4,862 |
| 41 | webuy.com | 4,640 |
| 42 | wikiwand.com | 4,600 |
| 43 | plus.lefigaro.fr | 4,526 |
| 44 | premiere.fr | 4,494 |
| 45 | theguardian.com | 4,434 |
| 46 | time.is | 4,349 |
| 47 | billboard.com | 4,327 |
| 48 | imdb.com | 4,304 |
| 49 | shopee.ph | 4,216 |
| 50 | epicgames.com | 4,084 |
| 51 | justwatch.com | 4,051 |
| 52 | hotels.com | 4,020 |
| 53 | forbes.com | 3,941 |
| 54 | ign.com | 3,815 |
| 55 | hbomax.com | 3,692 |
| 56 | bloomberg.com | 3,681 |
| 57 | vocabulary.com | 3,684 |
| 58 | soundcloud.com | 3,510 |
| 59 | indeed.com | 3,488 |
| 60 | bbc.com | 3,476 |
| 61 | vikidia.org | 3,451 |
| 62 | reuters.com | 3,378 |
| 63 | google.co.il | 3,359 |
| 64 | cambridge.org | 3,329 |
| 65 | ca.gov | 3,324 |
| 66 | playstation.com | 3,246 |
| 67 | dell.com | 3,241 |
| 68 | bing.com | 3,186 |
| 69 | nhl.com | 3,142 |
| 70 | genius.com | 3,057 |
| 71 | famousbirthdays.com | 3,055 |
| 72 | pornhub.com | 2,995 |
| 73 | itv.com | 2,935 |
| 74 | mit.edu | 2,913 |
| 75 | nih.gov | 2,845 |
| 76 | independent.co.uk | 2,833 |
| 77 | netflix.com | 2,806 |
| 78 | nytimes.com | 2,751 |
| 79 | google.com.br | 2,680 |
| 80 | radiofrance.fr | 2,597 |
| 81 | thesaurus.com | 2,519 |
| 82 | france24.com | 2,464 |
| 83 | search.google | 2,418 |
| 84 | nps.gov | 2,379 |
| 85 | chess.com | 2,368 |
| 86 | rateyourmusic.com | 2,304 |
| 87 | nintendo.com | 2,302 |
| 88 | dictionary.net | 2,290 |
| 89 | kpmg.com | 2,276 |
| 90 | nasa.gov | 2,221 |
| 91 | gog.com | 2,187 |
| 92 | loc.gov | 2,161 |
| 93 | discovery.ca | 2,096 |
| 94 | amazon.co.uk | 2,078 |
| 95 | aliexpress.com | 2,076 |
| 96 | house.gov | 2,067 |
| 97 | office.com | 2,061 |
| 98 | last.fm | 2,053 |
| 99 | wikiquote.org | 2,035 |
| 100 | dailymail.co.uk | 2,002 |
| 101+ | 62,102 additional niche-specific domains in full dataset covering 72,885,055 additional entities | |
Why This Data Matters
Google validates entity information through patterns of corroborating mentions across trusted domains. This list shows where Google recognizes all entity types - but here's the catch: entity authority is extremely niche-specific.
Entity Validation at Scale
Google's Knowledge Graph requires consistent entity recognition across validated domains.
- Only 3.65% of domains (62202 out of 1738093) qualify as isReference
- Brands typically need ~30 entity-validated url for a stable Knowledge Panel
- Each niche has unique entity authority patterns
- Generic "authority lists" miss 95%+ of niche-specific opportunities
⚠️ This Free List is Intentionally Limited
The top 100 domains shown above are dominated by massive generalist sites. For 99% of brands, the real opportunities lie in the niche-specific domains that only appear in our full platform dataset.
Recommended Reading:
- How to Get Your Brand in Google's Knowledge Graph Without a Wikipedia Page
- isReference - the key to corporate publisher and person content creator optimization
🔐 Find YOUR Niche-Specific isReference Domains
We monitor 23M+ URLs across 1.7M domains to identify the exclusive 3.65% that qualify as isReference domains for 72M+ entities. The Kalicube Pro platform maps your competitive landscape and identifies your niche-specific opportunities in 15 minutes.
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